descriptions: simply connect the dock with the USB 2.0 data cable to your computer ,then place your for ipad in the dock to sync the dataconnect the dock to an electrical outlet with the ipad USB power adapter to charge the for ipad batteryit is impossible to charge your for ipad via your computer USB ports because for apple ipad need a 2A input charging current,and the USB ports of a usual computer can only support about 500mA to 700Mawelcome your requiry!